I am on the fence - I'll probably get one eventually when it is cheap enough, but so far I'm just waiting for more and better games that will be released when the console launches. That new Uncharted game looks good, but it's only ONE game. I've made the mistake of buying a system for one game before, and I'm not going to do that again.
Of the other launch titles, the only one that remotely interests me is WipeOut 2048, but as much as I like WipeOut, I realize that I'm TERRIBLE at WipeOut, and I usually get just as much Frustration out of playing it, as I do enjoyment. Killzone on the PSP wasn't very good, so I'm not sure about the new Killzone game either. The rest are sports games, and I don't like sports games or Ridgeracer. As for a new Call of Duty game.... I've already exhausted my interest in that series on the PC. I have no desire to play it on a handheld.
Don't get me wrong: The PSVita looks to be an amazing piece of technology. But so was the PSP when it was first released. As amazed as I am at the many functions of the PSP - I already have an iPod and a phone that can do everything the PS Vita can (except play the games of course).
You know what would REALLY spark my interest and ensure that I buy the PSVita on day one? If it could play downloadable PS2 games. I would shell out an arm and a leg for a PSVita if I had access to all the PS2 games on the PSN.
I'm sorry - but I just don't have the money for one. I've got Uncharted 3, Battlefield 3, Deux Ex Human Revolution, Gears of War 3, maybe Resistance 3 (god there's a lot of threes this year ain't there?), Batman Arkham City and possibly Dark Souls to buy. In Australian dollars, assuming I buy them all on day one for as cheap as I can... that's.... about $600~650 right there. I just can't afford a PS Vita. Or a 3DS for that matter.
Let me end this by saying: I don't hate the Vita. It looks amazing. I'm looking forward to the neat indie and experimental games that Sony puts out for it, as they did with the PSP. And I will get one.... ONE day. But as it stands, I don't see a compelling reason to buy it right away. Why get Uncharted "Lite" for the Vita, when you can buy Uncharted 3 which will be better in every way? It just doesn't quite have the software line up it needs.